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View picture in original size
Fig. 1

View picture in original size
Fig. 2

Hamilton 77

manual wind

5.75 x 7.25''', Dm= 13.05 x 16.2mm
Do= 13.05 x 16.5mm
H= 3.55mm
F= 0.9mm
T= 1.7mm
17 jewels
f = 18000 A/h
power reserve 39h

Balance staff U3484

Mainspring / battery
Zf909, 1.35 x 6.0 x 0.07 x 180mm

1.00 x 0.50mm

Comments about the data

Breguet hairspring

screw balance, Breguet hairspring:
750: 17 jewels
751: 17 jewels, no damaskeening
757: 22 jewels, Kif-Flector
77: 17 jewels, Kif-Flector
ring balance, flat hairspring:
761: 22 jewels, Kif-Flector
780: 17 jewels, Kif-Flector, mobile stud carrier

Example, year: signature; shock device
ca. 1955: Hamilton 77, U.S.A., 17 Jewels; Kif-Flector

Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft

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